<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Apage</title>
</head>
<body>
    <h3 >发送POST请求</h3>
    <form method="POST" action="Bpage">      
        用户名：<input type="text" name="username">
        <input type="submit" value="跳转到B页面">

    </form>
</body>
</html>